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Linux and SSH
- RHEL
- VIM
- Neovim
- SSH
- OpenSSL
- Linux Blogs
- Spanish Linux Blogs
- Youtube
- Linux Commands and Tools
- BusyBox
- Bash
- Zsh
- ZX
- bpftrace
- Linux processes
- Linux Memory
- Linux and Kubernetes
- Linux Libraries
- Linux Networking
- Networking Protocols
RHEL
- infoworld.com: Red Hat’s crime against CentOS In the beginning, no one expected to get Red Hat Enterprise Linux for free. The end of CentOS as a free drop-in replacement is no cause for outrage.
- arstechnica.com: CentOS is gone—but RHEL is now free for up to 16 production servers RHEL is now free for dev teams, and it's even free in production for up to 16 systems.
- cyberciti.biz: Red Hat introduces new no-cost RHEL option
- zdnet.com: Red Hat introduces free RHEL for small production workloads and development teams In response to complaints about Red Hat's latest plans for CentOS Linux, Red Hat will start offering no-cost Red Hat Enterprise Linux for small production workloads and customer development teams.
- enterpriseai.news: Red Hat’s Disruption of CentOS Unleashes Storm of Dissent
- arstechnica.com: Why Red Hat killed CentOS—a CentOS board member speaks "The CentOS Board doesn't get to decide what Red Hat engineering teams do."
- zdnet.com: Red Hat introduces free RHEL for open-source, non-profit organizations Some CentOS users still aren't happy, but Red Hat is keeping its promise to open-source organizations that they'll have access to a free version of RHEL.
- genbeta.com: Red Hat Enterprise Linux lanza una versión a bajo costo para llegar a más público de sectores de investigación y académico
- makeuseof.com: The 4 Best RHEL-Based Alternatives to CentOS Now that CentOS is gone, you should make a switch to some other OS. Check out these four RHEL-based CentOS alternatives.
- centos.org: Comparing Centos Linux and CentOS Stream The CentOS Project produces two variants: CentOS Linux and CentOS Stream. They are alike in many ways. Here’s what sets them apart.
- cloudsavvyit.com: Is Rocky Linux the new CentOS?
VIM
- VimWiki
- redhat.com: Vim: Basic and intermediate commands
- dev.to: Another one short Vim cheat sheet
- thevaluable.dev: A Vim Guide for Advanced Users
- redhat.com: Recursive Vim macros: One step further into automating repetitive tasks Take Vim to the limit with recursive macros.
- openvim.com Interactive Vim tutorial for developers, sysadmins and Linux or Unix users.
Neovim
- neovim hyperextensible Vim-based text editor
SSH
- gravitational.com: How to SSH Properly 🌟
- 19 Common SSH Commands In Linux With Examples
- commandlinefu.com/commands/matching/ssh
- Auto-SSH for Linux security
- Grant-Revoke-ssh-access To automate the process of granting ssh access to a group of servers instances
- How to use SSH properly and what is SSH Agent Forwarding
- How To Set up SSH Keys on a Linux / Unix System
- opensource.com: Bypass your Linux firewall with SSH over HTTP Remote work is here to stay; use this helpful open source solution to quickly connect and access all your devices from anywhere.
- Túneles SSH
- paepper.com: How to properly manage ssh keys for server access
- goteleport.com: SSH Certificates Security. SSH Access Hardening 🌟
- dev.to: How to Manage Multiple SSH Key Pairs
- cyberciti.biz: Top 20 OpenSSH Server Best Security Practices
- cyberciti.biz: How To Reuse SSH Connection To Speed Up Remote Login Process Using Multiplexing
- cyberciti.biz: OpenSSH Change a Passphrase With ssh-keygen command
- thenewstack.io: SSH Made Easy with SSH Agent and SSH Config
OpenSSL
- redhat.com: 6 OpenSSL command options that every sysadmin should know Look beyond generating certificate signing requests and see how OpenSSL commands can display practical information about certificates.
- tecmint.com: Testssl.sh – Testing TLS/SSL Encryption Anywhere on Any Port
Linux Blogs
- The Linux Foundation
- tecmint.com 🌟
- nixCraft 🌟
- unixmen.com 🌟
- opensource.com 🌟
- linux.com 🌟
- linoxide.com 🌟
- linuxjourney.com
- howtoforge.com
- tecadmin.net
- systemcodegeeks.com
- linuxnix.com
- learnitguide.net
- FOSS Force
- linuxhomenetworking.com
- linuxtoday.com
- unixetc.co.uk
- LWN.net
- Linux-tutorial.info
- The Lone Sysadmin
- LinuxLinks.com
- unixmages.com
- The Geek Stuff
Spanish Linux Blogs
Youtube
- reddit.com/r/linuxadmin Expanding Linux SysAdmin knowledge
Linux Commands and Tools
- watchman command: A File and Directory Watching Tool for Changes
- ip command: How to use IP Command in Linux with Examples
- curl command: Understanding the Hidden Powers of curl
- How To Use grep Command In Linux / UNIX 🌟
- tecmint.com: vtop – A Linux Process and Memory Activity Monitoring Tool
- tecmint.com: How to Install htop on CentOS 8
- cyberciti.biz: bpytop – Awesome Linux, macOS and FreeBSD resource monitor
- redhat.com: Save time at the command line with HTTPie instead of curl Automate testing endpoints, downloading files, and submitting forms with HTTPie.
- redhat.com: World domination with cgroups part 8: down and dirty with cgroup v2
- freecodecamp.org: RSync Examples – Rsync Options and How to Copy Files Over SSH
- tecmint.com: How to Control Systemd Services on Remote Linux Server
- redhat.com: Vim: Basic and intermediate commands
- redhat.com: Using ssh-keygen and sharing for key-based authentication in Linux SSH key-based authentication is helpful for both security and convenience. See how to generate and share keys.
- tecmint.com: How to Run Commands from Standard Input Using Tee and Xargs in Linux
- cyberciti.biz: How to configure pfSense as multi wan (DUAL WAN) load balance failover router
- nikhilism.com: Mystery Knowledge and Useful Tools
- developers.redhat.com: Linux commands for developers
- cyberciti.biz: BASH Shell Change The Color of Shell Prompt on Linux or UNIX
- cyberciti.biz: How to check TLS/SSL certificate expiration date from command-line
- igoroseledko.com: Parallel Rsync
- redhat.com: How to record your Linux terminal using asciinema Asciinema might be the application you've been looking for to demonstrate a skill or process that you want your colleagues or students to learn on-demand.
- redhat.com: 5 advanced rsync tips for Linux sysadmins Use rsync compression and checksums to better manage file synchronization.
- metacpan.org: a2p - Awk to Perl translator A2p takes an awk script specified on the command line (or from standard input) and produces a comparable perl script on the standard output.
- redhat.com: 5 questions to ask during your next sysadmin interview
- oilshell: Alternative shells
- Timezone Bullshit
- cyberciti.biz: How to check memory utilization in Linux
- tecmint.com: Different Ways to Use Column Command in Linux
- opensource.com: How to use the Linux grep command
- dnschecker.org 🌟
- tecmint.com: 10 Useful Commands to Collect System and Hardware Information in Linux
- cyberciti.biz: How To Find Largest Top 10 Files and Directories On Linux / UNIX / BSD
- cyberciti.biz: How to restart systemd without rebooting Linux when critical libraries installed
- cyberciti.biz: How to install ncdu on Linux / Unix to see disk usage
- cyberciti.biz: 21 Examples To Make Sure Unix / Linux Configuration Files Are Free From Syntax Errors
- opensource.com: Don't love diff? Use Meld instead Meld is a visual diff tool that makes it easier to compare and merge changes in files, directories, Git repos, and more.
- kalilinuxtutorials.com: Ldsview : Offline search tool for LDAP directory dumps in LDIF format
- medium: Useful Commands/Solutions
- CLImagic subscription
- cyberciti.biz: How to save terminal output to a file under Linux/Unix
- cyberciti.biz: ls* Commands Are Even More Useful Than You May Have Thought
- linuxtechlab.com: Search a file in Linux using Find & Locate command
- tecmint.com: How to Install and Configure ‘Collectd’ and ‘Collectd-Web’ to Monitor Server Resources in Linux
- sysadminxpert.com: How to watch real time TCP and UDP ports on Linux (netstat & ss) 🌟
- cyberciti.biz: How to flush Redis cache and delete everything using the CLI
- cyberciti.biz: How To: Linux Find Large Files in a Directory
- linuxteck.com: 15 basic curl command in Linux with practical examples
- linuxteck.com: 12 basic cat command in Linux with examples
- tecmint.com: How to Find Recent or Today’s Modified Files in Linux 🌟
- linuxshelltips.com: How to Use Netcat to Scan Open Ports in Linux 🌟
- Rclone 🌟🌟🌟 Rclone is a command line program to manage files on cloud storage. It is a feature rich alternative to cloud vendors' web storage interfaces. Over 40 cloud storage products support rclone including S3 object stores, business & consumer file storage services, as well as standard transfer protocols. Rclone has powerful cloud equivalents to the unix commands rsync, cp, mv, mount, ls, ncdu, tree, rm, and cat. Rclone's familiar syntax includes shell pipeline support, and --dry-run protection. It is used at the command line, in scripts or via its API.
- cyberciti.biz: 8 Tips to Solve Linux Hard Disk Problems: Like Disk Full Or Can’t Write to the Disk
- blog.ycrash.io: dmesg – Unix/Linux command, beginners introduction with examples
- opensource.com: Use XMLStarlet to parse XML in the Linux terminal Become an XML star with XMLStarlet, an XML toolkit for your terminal.
- redhat.com: 5 Linux commands I'm going to start using Five standard Linux commands that can make your life much easier.
- developers.redhat.com: Build your own RPM package with a sample Go program to simplify installing, updating, or removing a piece of software
- cyberciti.biz: How to copy and transfer files remotely on Linux using scp and rsync
- nginx.com: What Are Namespaces and cgroups, and How Do They Work? 🌟 Namespaces provide isolation of system resources, and cgroups allow for fine‑grained control and enforcement of limits for those resources. Containers are not the only way that you can use namespaces and cgroups. Namespaces and cgroup interfaces are built into the Linux kernel, which means that other applications can use them to provide separation and resource constraints.
- cyberciti.biz: How to check CPU temperature on Ubuntu Linux
- opensource.com: Check used disk space on Linux with du Find out how much disk space you're using with the Linux du command.
- linuxshelltips.com: How to Kill Running Linux Process on Particular Port
- freecodecamp.org: The Linux Command Handbook 🌟
- sysadminxpert.com: How to do Security Auditing of CentOS System Using Lynis Tool
- tecmint.com: 10 Practical Examples of Rsync Command in Linux
- tecmint.com: 10 Useful du (Disk Usage) Commands to Find Disk Usage of Files and Directories
- tecmint.com: What’s Difference Between Grep, Egrep and Fgrep in Linux?
- opensource.com: Check file status on Linux with the stat command
- tecmint.com: How to Kill Linux Process Using Kill, Pkill and Killall
BusyBox
- busybox.net BusyBox: The Swiss Army Knife of Embedded Linux
- genbeta.com: BusyBox, el ejecutable que agrupa casi 200 utilidades Unix de línea de comandos (y que puedes usar también en Windows o Android)
Bash
- igoroseledko.com: Checking Multiple Variables in Bash
- Introduction to Bash Scripting Interactive training
- datafix.com.au: BASHing data - Data ops on the Linux command line 🌟
- medium: How to trigger an action at the end of the Shell/Bash script Using Bash/Shell trap, a built-in command to define any action to be executed before exiting the Bash or Shell script. You can define multiple actions and per signal.
- redhat.com: Bash scripting: How to read data from text files Here's how to extract data from a text file such as reading in a list of servers to test connectivity to them.
- pement.org: Over 100 sed one-liners
- github: Safe ways to do things in bash
- rexegg.com: Regex Syntax Tricks
- pement.org: Handy one-line scripts for AWK
- flowfactor.be: Unit testing bash scripts the cloud-native way
- robertmuth.blogspot.com: Better Bash Scripting in 15 Minutes
- cyberciti.biz: How To Bash Shell Find Out If a Variable Is Empty Or Not
- Bash Pitfalls 🌟
- cyberciti.biz: Bash For Loop Examples
- opensource.com: Parsing config files with Bash Separating config files from code enables anyone to change their configurations without any special programming skills.
- cloudsavvyit.com: How to Use Multi-Threaded Processing in Bash Scripts
- opensource.com: How to include options in your Bash shell scripts
- bash.cyberciti.biz Wiki 🌟
Zsh
- Oh My Zsh Oh My Zsh is a delightful, open source, community-driven framework for managing your Zsh configuration. It comes bundled with thousands of helpful functions, helpers, plugins, themes, and a few things that make you shout...
- zshdb.readthedocs.io zshdb - a gdb-like debugger for zsh
ZX
- zx A tool for writing better scripts
bpftrace
- bpftrace High-level tracing language for Linux eBPF. bpftrace is pretty impressive in terms of conciseness and practicality of their docs.
- https://github.com/iovisor/bpftrace/blob/master/docs/reference_guide.md
- https://github.com/iovisor/bpftrace/blob/master/docs/tutorial_one_liners.md
- https://github.com/iovisor/bpftrace/blob/master/docs/internals_development.md
Linux processes
Linux Memory
Linux and Kubernetes
Systemd
- Start using systemd as a troubleshooting tool While systemd is not really a troubleshooting tool, the information in its output points the way toward solving problems.
Blogs
CommandLineFu
- CommandLineFu 🌟
- twitter.com/commandlinefu Command line diamonds, created and voted on by our members
- twitter.com/commandlinefu3 3-star commands, a Linux afficionado's wet dream
- twitter.com/commandlinefu10 10 star command line gems - known to make experienced sysadmins weep with joy.
Wait until Your Dockerized Database Is Ready before Continuing
- Wait until Your Dockerized Database Is Ready before Continuing A zero dependency Bash script that waits until a command of your choosing has run successfully
Copr Build System
- Building a repo with RPM packages from PyPI is super easy using Copr.
- copr.fedorainfracloud.org Copr is an easy-to-use automatic build system providing a package repository as its output.
- Copr
Pulp
- pulpproject.org Fetch, Upload, Organize, and Distribute Software Packages.
Hashicorp
Linux Libraries
Linux Networking
- ntop
- ngrep
- Angry IP Scanner (or simply ipscan) to Nmap and cross-platform
- cyberciti.biz - ss: Display Linux TCP / UDP Network and Socket Information
- cyberciti.biz - SS Utility: Quick Intro
- binarytides.com - 10 examples of Linux ss command to monitor network connections
- unix.stackexchange.com: ss - linux socket statistics utility output format
- stackoverflow.com: difference between netstat and ss in linux?
- lintut.com: Monitoring network connection using ss command
- Linux networking examples and tutorials for advanced users Includes lab examples for lxc, bgp, vpn, & more
- blog.pandorafms.org: Useful Network commands VNStat, ping, traceroute, ping, arp, curl and wget, netstat, whois, ssh, tcpdump, ngrep, nmap, netcat, lsof, iptraf
- Diferencias entre servidor proxy y servidor proxy inverso
- cyberciti.biz: Linux ip Command Examples 🌟
- cyberciti.biz: Linux: 25 Iptables Netfilter Firewall Examples For New SysAdmins
- redhat.com: 6 tcpdump network traffic filter options The first six of eighteen common tcpdump options that you should use for network troubleshooting and analysis.
- redhat.com: Learn the networking basics every sysadmin needs to know
- tecmint.com: 16 Useful Bandwidth Monitoring Tools to Analyze Network Usage in Linux
- iximiuz.com: Illustrated introduction to Linux iptables
- linuxteck.com: 15 basic useful firewall-cmd commands in Linux
Networking Protocols
- freecodecamp.org: TCP vs. UDP — What's the Difference and Which Protocol is Faster?
- howdns.works A fun and colorful explanation of how DNS works.
[](https://github.com/jlevy/the-art-of-command-line)
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